Commit-ID: b0c9d7ff2793502650ad987c3f237d5fe5587a1e
Gitweb: http://git.kernel.org/tip/b0c9d7ff2793502650ad987c3f237d5fe5587a1e
Author: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
AuthorDate: Tue, 29 Mar 2011 12:56:56 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Thu, 5 May 2011 23:16:57 -0700
rcu: add DEBUG_OBJECTS_RCU_HEAD check for alignment
Verify that rcu_head structures are aligned to a four-byte boundary.
This check is enabled by CONFIG_DEBUG_OBJECTS_RCU_HEAD.
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
---
include/linux/rcupdate.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 9e169c2..c7aeacf 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -785,6 +785,7 @@ extern struct debug_obj_descr rcuhead_debug_descr;
static inline void debug_rcu_head_queue(struct rcu_head *head)
{
+ WARN_ON_ONCE((unsigned long)head & 0x3);
debug_object_activate(head, &rcuhead_debug_descr);
debug_object_active_state(head, &rcuhead_debug_descr,
STATE_RCU_HEAD_READY,
--
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